CVE-2026-110842 n8n - Privilege Escalation

n8n < 2.41.4 and 2.42.x < 2.42.1 contains a prototype pollution vulnerability caused by unsafe evaluation of caller-supplied code in MCP workflow-validation tool, letting authenticated users with workflow:read grant bypass permission checks and takeover owner accounts without MFA.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-1321

Vendor fix

Upgrade to version 2.41.4 or 2.42.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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